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The first ±800kV UHVDC transmission project in the world

1. Yunnan-Guangdong ±800kV UHVDC transmission project
Yunnan-Guangdong ±800kV UHVDC transmission project is the first ±800kV UHVDC transmission project in the world and also the self demonstration project of UHVDC transmission in our country. The project starts from Lufeng County, Chuxiongzhou, Yunnan Province, to Zengcheng City, Guangzhou, through Yunnan, Guangxi and Guangdong three provinces (areas), total 1438km DC lines, ±800kV rated DC voltage, 5000,000 kW rated transmission capacity and it was planed to put into operation by single pole in 2009 and by dual pole in 2010.
XD Group undertook the equipments of one station in this project such as thyristor valve, 14 sets of low end converter transformers, 2 sets of high end converter transformers, part DC field equipments, capacitor devices and capacitive voltage transformers and so on and it also took part in the system study and whole set of design of the project. Its total contract sum is almost 40% of total domestic supply sum and it is the largest domestic equipment manufacture enterprise for contracting this project.

Yun-Guang capacitor devices made by China XD mounted on site

Yun-Guang converter transformer made by China XD

Yun-Guang converter valve made by China XD

2. Xiangjiaba-Shanghai ±800kV UHVDC transmission project
Xiangjiaba-Shanghai ±800kV UHVDC transmission demonstration project started from Fulong convertor station, Yibin City, Sichuan to Fengxian convertor station, Shanghai City. Two ±800kV convertor stations were newly built, 6,400,000 million kW rated transmission capacity, 7, 000,000 kW maximum continuous transmission capacity; one ±800 kV DC transmission lines was newly built through Sichuan, Chongqing, Hunan, Hubei, Anhui, Zhejiang, Jiangsu and Shanghai eight provinces and cities, total 1900km. The project was approved by National Development and Reform Commission in Apr., 2007, laid a foundation in May, 2007; the starting to work ceremony was held in Yibin in Dec., 2007; it was planned to be finished and put into operation by dual pole in 2010.
XD Group provided the Fulong convertor station in this project with one ±800kV converter transformer, one ±600kV converter transformer, four ±400kV converter transformers, four ±200kV converter transformers and one set of converter valve on Fulong station and it also took part in the system study and the whole set design.
XD Group also provided the project with CB, SC parallel high voltage capacitor, 500kV arrester, filter, disconnector and earthing switch and resistor etc high voltage AC equipments.

Converter valve for Xiangjiaba-Shanghai ±800kV UHVDC transmission project tested in test lobby

Converter transformer 1

Converter transformer 2


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